合成和表征一种基于生物aldehyde的素粘合剂,具有理想的抗水性
Huali Lin1, Xinyi Chen1, Hong Lei2
1Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, College of Material and Chemical Engineering, Southwest Forestry University, Kunming 650224, China; International Joint Research Center for Biomass Material, Southwest Forestry University, Ministry of Science and Technology, Kunming 650224, China.
International journal of biological macromolecules
|February 9, 2024
概括
开发了一种新的生物基粘合剂 (OSL),使用氧化糖 (OS) 和二硫酸盐 (L) 作为安全的甲替代品. 这种可持续的粘合剂为木材应用提供了卓越的耐水性和强度.
科学领域:
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
- 木材复合材料 木材复合材料
背景情况:
- 基于甲的粘合剂主导着木板生产,由于甲排放,造成严重的健康和环境风险.
- 在木材粘合剂行业,对甲有着更安全,更可持续的替代品的迫切需要.
研究的目的:
- 开发和优化一种完全基于生物的粘合剂 (OSL),使用氧化糖 (OS) 和二硫酸盐 (L) 作为甲替代品.
- 评估OSL粘合剂在木材粘合应用中的性能,特别是耐水性和剪切强度.
主要方法:
- 糖糖的氧化产生多化 (OS).
- 在OS和二硫酸盐 (L) 之间发生凝结反应,形成OSL粘合剂.
- 反应条件的优化:氧化剂水平 (13%),OS/L比率 (0.8) 和热压温度 (200°C).
- 在水浸泡 (热水和沸水) 之前和之后,评估与OSL粘合剂粘合的合板的剪切强度.
- 使用FTIR,1H NMR和XPS进行化学表征,以确认反应和结构.
主要成果:
- 优化的OSL粘合剂制剂产生了高糖转化为化物.
- 用OSL粘合剂粘合的合板显示出显著的剪切强度 (1.04 MPa),在热水浸泡后增加到1.42 MPa,在沸水浸泡后保持高 (1.03 MPa).
- 光谱分析证实了OS和L之间的加法反应,形成了一个密集的网络结构,增强了耐水性.
- 与传统的林-甲 (LF) 树脂相比,OSL粘合剂具有更高的湿切割强度.
结论:
- 氧化糖 (OS) 是一种可行的,安全和有效的生物基替代形式在粘合剂配方中的替代品.
- 开发的OSL粘合剂具有出色的抗水性和机械强度,使其适用于苛刻的木材应用.
- 这项研究为开发基于素的先进粘合剂提供了有前途的途径,在潮湿的环境中增强了耐用性.
相关概念视频
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Capillary action is a result of water’s adhesive tendencies. When a narrow glass...
Capillary action is a result of water’s adhesive tendencies. When a narrow glass...
01:21Wood Products
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